<?php (defined('BASEPATH')) OR exit('No direct script access allowed');

// Originaly CodeIgniter i18n library by J�r�me Jaglale
// http://maestric.com/en/doc/php/codeigniter_i18n
// modification by Yeb Reitsma

/*
in case you use it with the HMVC modular extension
uncomment this and remove the other lines
load the MX_Loader class */

//require APPPATH."third_party/MX/Lang.php";

//class MY_Lang extends MX_Lang {

class MY_Lang extends CI_Lang
{


    /**************************************************
     * configuration
     ***************************************************/

    // languages
    private $languages = array(
        'vi' => 'vietnamese',
        'en' => 'english'
    );

    // special URIs (not localized)
    private $special = array(
        "admincp"
    );

    // where to redirect if no language in URI
    private $uri;
    private $default_uri;
    private $lang_code;

    /**************************************************/


    function MY_Lang()
    {
        parent::__construct();

        global $CFG;
        global $URI;
        global $RTR;

        $this->uri = $URI->uri_string();
        $this->default_uri = $RTR->default_controller;

        $uri_segment = $this->get_uri_lang($this->uri);
        $this->lang_code = $uri_segment['lang'];

        $url_ok = false;
        if ((!empty($this->lang_code)) && (array_key_exists($this->lang_code, $this->languages))) {
            $language = $this->languages[$this->lang_code];
            $CFG->set_item('language', $language);
            $url_ok = true;
        }

        if ((!$url_ok) && (!$this->is_special($uri_segment['parts'][0]))) // special URI -> no redirect
        {
            // set default language
            $CFG->set_item('language', $this->languages[$this->default_lang()]);

            $uri = (!empty($this->uri)) ? $this->uri : $this->default_uri;
            $uri = ($uri[0] != '/') ? '/' . $uri : $uri;
            $new_url = $CFG->config['base_url'] . $this->default_lang();

            header("Location: " . $new_url, TRUE, 302);
            exit;
        }
    }



    // get current language
    // ex: return 'en' if language in CI config is 'english' 
    function lang()
    {
        global $CFG;
        $language = $CFG->item('language');

        $lang = array_search($language, $this->languages);
        if ($lang) {
            return $lang;
        }

        return NULL; // this should not happen
    }


    function is_special($lang_code)
    {
        if ((!empty($lang_code)) && (in_array($lang_code, $this->special)))
            return TRUE;
        else
            return FALSE;
    }


    function switch_uri($lang)
    {
        if ((!empty($this->uri)) && (array_key_exists($lang, $this->languages))) {

            if ($uri_segment = $this->get_uri_lang($this->uri)) {
                $uri_segment['parts'][0] = $lang;
                $uri = implode('/', $uri_segment['parts']);
            } else {
                $uri = $lang . '/' . $this->uri;
            }
        }

        return $uri;
    }

    //check if the language exists
    //when true returns an array with lang abbreviation + rest
    function get_uri_lang($uri = '')
    {
        if (!empty($uri)) {
            $uri = ($uri[0] == '/') ? substr($uri, 1) : $uri;

            $uri_expl = explode('/', $uri, 2);
            $uri_segment['lang'] = NULL;
            $uri_segment['parts'] = $uri_expl;

            if (array_key_exists($uri_expl[0], $this->languages)) {
                $uri_segment['lang'] = $uri_expl[0];
            }
            return $uri_segment;
        } else
            return FALSE;
    }


    // default language: first element of $this->languages
    function default_lang()
    {
        global $CFG;
        $lang = array_search($CFG->config['language'], $this->languages);
        return $lang;
    }

    // add language segment to $uri (if appropriate)
    function localized($uri)
    {
        if (!empty($uri)) {
            $uri_segment = $this->get_uri_lang($uri);
            if (!$uri_segment['lang']) {
                if ((!$this->is_special($uri_segment['parts'][0])) && (!preg_match('/(.+)\.[a-zA-Z0-9]{2,4}$/', $uri))) {
                    $uri = $this->lang() . '/' . $uri;
                }
            }
        }
        return $uri;
    }
}

// END MY_Lang Class

/* End of file MY_Lang.php */
/* Location: ./application/core/MY_Lang.php */